1. Discussion D8.1 Kerns & Irwin Sections 10-1 -- 10-5, 10-10
Diodes and LEDs
Discussion D8.1
Kerns & Irwin
Sections , 10-10

4. Covalent bonds -- Insulator

5. Semiconductors
Adding a very small amount of B or Ga to Si makes a p-type semi-conductor with a missing electron (a hole)
Adding a very small amount of P or As to Si makes an n-type semi-conductor with an extra electron

14. Diodes + -

15. Light Emmitting Diode LEDhn + -

16. Turning on an LED

17. Turning on an LED
This is what
we use in Lab